晋西北风沙区长期不同植被恢复类型下土壤物理特征分析

摘要

The study analyzed the soil water content and soil particle size of different soil layer among different vegetation restoration types in Shizuitou village,Wuzhai county northwest of Shanxi province.The results showed that the soil composition was primary sand and silt as a result of the soil texture.The soil particle size in different vegetation restoration showed significant variation,and the sorting character of Caragana Korshinskii Kom was the best.Soil bulk density in different vegetation restoration types was as follow:Populus L.＞ Caragana Korshinskii Kom ＞ artemisia ＞ grass,while the soil porosity showed opposite tendency.And soil bulk density of artemisia had significant difference with other vegetation restoration types (P ＜ 0.05).In addition,water content of soil quality,saturated moisture content and capillary moisture content had obvious different,and water content of soil quality and clay content indicated a extreme negative relationship,in contrary,water content of soil quality showed an extreme positive relation with silt and clay content,correlation index were-0.900,0.890,0.819,respectively.%以晋西北地区忻州市五寨县石咀头村为研究地,采集不同植被恢复类型和不同深度土层的土壤样本,分析该地区的土壤水分及粒度特征.结果表明,该地区不同植被恢复类型下土壤砂粒、粉粒、黏粒的含量存在差异,粒度组成主要以砂粒和粉粒为主,总体属于砂土和壤土质地;不同植被恢复类型下土壤粒度参数也存在明显差异,其中,柠条地的分选性最好;土壤容重在不同植被恢复类型下表现为:杨树林地＞柠条地＞蒿地＞草地,孔隙度的变化趋势与之相反,其中,蒿地的土壤容重与另外3种植被恢复类型有显著差异(P＜0.05);4种植被恢复类型的土壤质量含水量、饱和持水量和毛管持水量间也存在很大差异,且土壤质量含水量与砂粒含量呈极显著负相关,与粉粒和黏粒含量呈极显著正相关,相关系数分别为-0.900,0.890,0.819.